Definition of blackthorn noun from the Oxford Advanced Learner's Dictionary

 

blackthorn

 noun
noun
BrE BrE//ˈblækθɔːn//
 
; NAmE NAmE//ˈblækθɔːrn//
 
[uncountable]
 
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a bush with thorns with black branches, white flowers and sour purple fruit called sloes
See the Oxford Advanced American Dictionary entry: blackthorn